Minute wheel and pinion



(No Model.)

0. V. WOERD.

MINUTE WHEEL AND PINION. No. 318,675. Patented May 26, 1885.

e "alum Lb UNITED STATES PATENT OFFICE.

CHARLES V. VVOERD, OF VVALTHAM, MASSACHUSETTS.

MINUTE WHEEL AND PINION.

SPECIFICATION forming part of Letters Patent No. 318,675, dated May 26,1885.

Application filed November 26, 1884.

To all whom it may concern:

Be it known that I, CHARLES V. Woman, of WValtham, in the county ofMiddlesex and State of Massachusetts, have invented an Improved Methodof and Means for Making Minute WVheels and Pinions, of which thefollowing is a specification.

This invention consists in forming the min ute wheel and pinion of awatch in a single piece by swaging or pressing a blank of metal againsta fiat surface having a die or cavity, into which a portion of the metalof the blank is crowded, said die being formed to convert the metal thusdisplaced into a pinion, the remaining portion of the blank beingflattened or extended laterally by the pressure, and afterward trimmedand provided with teeth, as I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification,Figure 1 represents a sectional view of the devices used in carrying outmy improved method before the blank is pressed. Fig. 2 represents asimilar view after the blank is pressed. Fig. 3 represents a top'view ofthe flat bed or surface having the pinion-forming die. Fig. 4 representsa side view of the wheel-blank and pinion as formed by my improvedmethod. Fig. 5 represents a section on line w m, Fig. 1.

The same letters of reference indicate the same parts in all thefigures.

In carrying out my invention I provide a block or bed having a flatupper surface, and in it I form a die or cavity, 12, the walls of whichpresent the exact converse of the pinion to be formed. On the bed a, andover the die or cavity 12, I place a blank, 0, from which the wheel andpinion are to be formed, said blank having a greater thickness andlesser area than the completed wheel. I then by means of a suitableflat-surfaced platen, 6, press the blank against the bed a withsufficient force to spread the blank laterally, (decreasing itsthickness) and to cause a part of the metal to enter the die I), asshown in Fig. 2. The metal entering the die is converted by the latterinto a finished pinion, 9, while (No model.)

the remaining portion of the blank is extended in area and reduced inthickness by the bed a and platen e sufficiently to convert it into ablank for the minute-wheel w, the wheel being subsequently completed bytrimming and forming teeth on the periphery of the blank in the usual orany suitable manner.

Heretofore minute wheels and pinions have been made in separate pieces,which have to be pinned or riveted together. The pinions being verysmall, (less than one-half the size shown in Figs. 4 and 5,) are verydelicate, and therefore liable to be injured by the operation ofsecuring them to the wheels. This diiiiculty is entirely avoided and aperfect pinion is produced by my improved method.

4. represents a pinion-shaped follower adapted to move in the die Z),and fitting the same closely. The upper end of said follower constitutesa fiat surface or bed against which the metal which enters the die toform the pinion is forced, the side of the pinion being thus made fiat.When the platen is raised, the follower t' is moved upwardly to ejectthe pinion from the die. This may be effected by a spring pressingagainst the lower end of the follower, or by any other suitable means.The longitudinal movement of the follower is limited by an enlargement,i, thereon and the sides of a chamber or cavity in the bed a againstwhich said enlargement strikes in rising and falling.

I claim- 1. The improved minute wheel and pinion swaged from a singlepiece of metal, as set forth.

2. A minute wheel and pinion made in a single piece, as set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 15th day of November, 1884..

CHAS. V. lVOERD.

Witnesses:

'Inos. B. EATON, THOMAS OURLEY.

